FLEXIBLE HARROW Russian patent published in 2016 - IPC A01B31/00 A01B21/02 A01B23/02 

FIELD: machine building.

SUBSTANCE: invention relates to agricultural machine building, particularly, to surface tillage tools. Flexible harrow comprises frame (1) with chain smoothing harrow (2) installed on it with possibility of rotation. Chain smoothing harrow (2) is made from main links (3) having rectangular cross-section, additionally interconnected by intermediate links (5). Intermediate links (5) have form of two mutually perpendicular semi-rings formed by half ring turning to 90° relative to horizontal axis. On main links (3) symmetrically relative to horizontal and vertical axes, four pairs of loosening teeth with sharpened ends are arranged. Each pair of loosening teeth is formed by square cross-section rod, bent along curved line, which has shape of reduced ellipse. Each pair of loosening teeth is additionally equipped with quick-detachable attachment element to main link (3). Quick-detachable attachment element may be made of upper and lower fixing plates and locking bolt. Fixing plates are made with slots for loosening of teeth and clamping bolt. Upper fixing plate is made L-shaped and has lug for connection with lower fixing plate.

EFFECT: this technical solution provides higher efficiency of soil surface tillage, higher operational reliability and manufacturability, reduced traction resistance.

1 cl, 4 dwg